year 9 gas pressure and temperature \

Why does the pressure increase when a gas is heated in a container?

• The particles collide with the walls more frequently

• The particles collide with the walls with more force

• The particles collide with each other at higher speeds

• The particles become less dense

If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?

• The pressure will increase

• The pressure will decrease

• The pressure will remain constant

• The pressure will equalize

Pressure is

• defined as the mass that an object exerts when at rest.

• not a measurable in gases.

• defined as the number of moles of substance divided by the mass of the substance.

• created by the force of the gas particles impacting the walls of the container.

Gases __________.

• have a fixed shape

• are easily compressed

• have particles that do not flow easily

• vibrate about a fixed point

In the graph, air pressure is on the Y axis and altitude increases to the right on the X axis. What statement below best describes the graph?

• pressure increases as altitude increase

• pressure decreases as altitude increases

• pressure decreases as altitude decreases

• atmospheric pressure is zero at sea level.

We can increase the pressure of a gas by:

• Not changing the temperature of the gas

• Decreasing the temperature of the gas

• Increasing the temperature of the gas

How do gas molecules move? 

• in an orderly fashion 
• constantly and randomly
• in a circular motion

True or False: Gases can be compressed. 

• True
• False

Which container will have a lower pressure?

• left
• right
• they both have the same pressure

When the temperature of matter increases the particles...

• speed up and move closer
• speed up and move farther apart
• slow down and move closer together
• slow down and move farther apart